Means for connecting conductors to commutator-brushes.



N. W. STORER.

MEANS FOR GONHEGTING GON'DUGTOBS T0 GOMMUTATOR BRUSHES.

APPLIGATIOII FILED APR. 4, 1906.

Patented Jan. 19, 1909.

WlTNESSES:

ATTORNEY UNITED STATES PATENT OFFICE.

NORMAN W. STORER, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

Specificationof Letters Patent.

Patented Jan. -19, 1909.

Application filed April 4, 190a Serial No. 309,892..

To all whom it may concern.

Be it known'that I, NORMAN W. STORER, a citizen of the United States, and a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Meansfor Connecting Conductors'to Commutator-Brushes, of which the followin is a specification.

M invention re ates to commutator brus es for dynamo-electric machines, and it has for its, ob ect to provide improved means for securing conductors thereto.

It has been, proposed by another than myself to rovide the outer end of a commutator brus with two or more cavities and to cover theend of the brush with aplate from which spllit pins or other resilient studs project into t e cavities, a fiexible conductor eing connected to the plate in a suitable manner. With such a structure, however,

it is necessary that the distances between the cavities and the pins be exactly e ual and that thepins be arallel, or else; ifi lculty will be ex erlence in applying the plate to the end 0 the brush, and. for these reasons also the parts may not be readily made interchangea but a single cavity in the outer end of the brush and to provide one or more recesses in the faces of the brush, in which projecting por tions of the plate may be located in such manner as not to interfere with the free movement of the brush within a suitable holder therefor. With such a structure, the parts may be made interchangeable without the exercise of extraordinary care in drilling the cavity in the outer end of the brush or in securing the split pin or resilient wedge to the end plate, and the plate may be readily ap lied to the end of theb'rush without diflicu t Figure 1 of the accompanying drawing is a view, in side elevation, of a commutator brush embodying my invention. Fig. 2 is a View, in end elevation, of the brush shown in Fig. 1; and Fig. 3 is a View of a modified structure from that shown in Figs. 1 and 2.

A co1nmutator brush l'that is composed of carbon or other suitable material is pro.- vided with a cavity 2 in its. outer end, 1nto which a split pin 3 or other suitable resilient wedge projects. otherwise secured to an end plate for the brush having lips or'projections 4 that are le. I accordingly propose to provide The pin 3 is riveted or, -jects from the 1plate into the cavity and is .self ex anded t bent downwardly into correspondingly located recesses 5 in the face of the brush, so that no portions of" the plate extend beyond the faces thereof. A lug 6, that is secured to the upper side of the endplate is provided with a cavity 7, in which the end of a flexible conductor 8 is soldered or otherwise secured. The split in or resilient wedge makes good electrica contact with the walls of the cavity ,2 and also serves to retain the end plate in position, the lips or'projections 4 serving to prevent turning or lateral displacement of the plate. The lips or projections l ma engage the same face of the brush, .as s own in Figs. 1 and 2, or they may be provided upon opposite edges of the end plate so as to engage opposite faces of the brush, or, if desired, they may en age the ends of the brush. Thus a detacha le connection to the brush is provided and the upper end of the brush is protected from wear or injury because the end plate serves as a wearing i'ece with which a s ring-pressed arm or 0t er part of a suitable older for the brush may engage.

claim as my invention: 1. The combination with a commutator brush havin a cavit and a recess, of a plate that covers t he cavi y and has a portion that is 'bentinto the recess with its outer surface flush with the brush surface, and an inher-' ently expanded stud projectingv from the plate and located in the cavity. I 2. The combination with a commutator brush having a cavity and a recess, of a plate that covers the. cavity and has a portion'90 seated completely within the recess, and an inherently ex anded stud projecting from the plate and coated in the cavity.

3. The combination with a commutator brush having a cavity and recesses, of a plate that covers the cavit and has portions that are seated com letey within'the recesses, and an inherent y expansible stud that projects from the late into the cavity and is self-ex anded t erein.

4. T e combination with a commutator brush having an end cavity and side recesses, of a plate that covers the cavity and has portions that are contained within the recesses, I and a resiliently expans'ible stud that proerein. e combmation with a commutator brush having an end cavity and side recesses, of a plate that covers the cavity and has p0rtions that are seated in the side recesses and are flush with the side faces of the brush, and a resiliently expansible stud that projects from the plate into the cavity and is self expanded therein.

In testimony whereof, I have hereunto subscribed my name this 30th day of March,

J. O. MCFRISTOR, BIRNEY HINEs. 

